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congruent (SSS) 2
Author:
Ricky Chan
GeoGebra
New Resources
異分母分數減法
【案例】2018年全国1卷理科12题
錐體建築師
畫出對稱圖形
兩位數除以一位數（一）
Discover Resources
三角函數
認識函數(表格形式隨機出題)
真方位角與羅盤方位角
Progressive Formula
Triangles with the same height
橢圓2--四圓心近似法
Discover Topics
Logarithm
Division
Rectangle
Upper and Lower Sum or Riemann Sum
Matrices